So with 2 180lb people you can only take 30-40lbs of fuel and you could well have the CG aft of the aerobatic limit.
Not all of us weigh 180lbs, with two lighter people it is not that hard to be under the aerobatic weight though CoG might still be a problem - even with only 40lbs of fuel you have 30mins fuel plus and you can get airborne with more fuel than that as long as you delay the aeros until you burn off the excess.